2006-08-18 23:58:36 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
If you want to get picky, the answer is no. Monotremes (Echidnas and Platypusses (Platyipii?) or more correctly Ornithorhynchus) only have a cloaca, just like reptiles and birds, although classed as mammals.
A fascinating group, they do appear to be a "missing link".
For example;
They lay eggs, but feed the young on milk, even though they do not have nipples.
They have three bones in the middle ear, a reptile has one.
The uterus (womb) is more like a bird's than a mammal's.
They have an interclavical bone in the shoulder, just like reptiles.
They have hair, which is a mammalian trait.
They are only semi-endothermic at best.
This is one example where classical taxonomy falls down. The monotremes aren't realy mammals, or reptiles, but a bit of both. They don't realy care, they just get on with life.
2006-08-19 01:26:20 · answer #1 · answered by Anonymous · 1⤊ 0⤋
yes but not in the same gender a female mammal will have a vagina and a mail mammal will have a penis
2006-08-19 07:02:25 · answer #2 · answered by jack ripper 1 · 0⤊ 0⤋
No. a very small subset have both (hermaphrodites).
2006-08-20 08:38:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Only one or the other, of course, there are the hermaphrodites......
2006-08-21 16:58:53 · answer #4 · answered by But Inside I'm Screaming 7 · 0⤊ 0⤋
Yes, basically.
2006-08-19 07:01:39 · answer #5 · answered by poisonivy4913 5 · 0⤊ 1⤋
No. They either have one or the other.
2006-08-19 07:02:03 · answer #6 · answered by Ray 7 · 1⤊ 0⤋
Yes, they do.
2006-08-19 07:02:01 · answer #7 · answered by WC 7 · 0⤊ 0⤋
l think so, that's how they mate.
2006-08-19 07:02:49 · answer #8 · answered by Anonymous · 0⤊ 0⤋